Three-proofing coating for flexible printed circuit board

Abstract

The invention relates to the technical field of printed circuit board protection and in particular relates to a three-proofing coating for a flexible printed circuit board. According to the three-proofing coating, the advantages of organic silicon resin and acrylic resin are integrated in formula, a low-toxicity efficient solvent is adopted for promoting dissolution and dispersion of the resin in water, a good curing effect is achieved, and ocimene has an effect of assisting in film formation and endows the coating with pleasant aroma; mixed resin is ultrasonically processed in the solvent at first technologically, so that the mixed resin easily reacts with other materials and is easily compatible with the materials, and the subsequent curing speed is increased; the prepared coating is a waterborne coating, is environmental friendly and has good waterproof moisture-resistant effects, and a cured paint film is good in hardness and toughness, can completely fit the flexible circuit board and is not easily cracked in vibration and bending processes of the flexible circuit board, so that three-proofing effects are further enhanced and the occurrence probability of circuit board faults caused by environmental factors is reduced.

Description

technical field [0001] The invention relates to the technical field of printed circuit board protection, in particular to a conformal paint for flexible printed circuit boards and a preparation method thereof. Background technique [0002] Printed circuit board refers to the formation of point-to-point interconnection lines and printed components on an insulating substrate according to a predetermined design, and is a provider of electrical connections for electronic components. Circuit boards are very common in daily life, ranging from small mobile phones, USB flash drives, and cameras to high-end products such as aerospace and high-speed trains. With the increasing variety and quantity of electronic products, it is particularly important to strictly control the quality of circuit boards to improve the competitiveness of electronic products. In the actual application process, the use environment of the circuit board is complex and diverse, and may face humidity, high heat,...

AI Technical Summary

Problems solved by technology

In the actual application process, the use environment of the circuit board is complex and diverse, and may face humidity, high heat, salt spray, low temperature, vibration, high dust and other environments. If no corresponding effective protection is carried out, the circuit board will quickly appear corrosion, deformation, Mildew, aging and other problems will eventually lead to circuit failure and equipment failure

[0003] In order to reduce the damage to the circuit board by the external environment and ensure the normal operation of the equipment, protective paint is often sprayed on the surface of the circuit board, also known as three anti-paint, and its main chemical components are acrylate, silicone, polyurethane, epoxy resin, etc. , the working principle is to form a protective film on the surface of the circuit board to protect the circuit board from the damage of the working environment, thereby improving the quality and reliability of the circuit board. Resist environmental pollutants, especially the corrosion of chemical pollutants, not easy to repair, toxic and harmful, etc., so it is necessary to improve the three anti-paint formula, further strengthen the comprehensive performance of the circuit board, improve the protection effect, in order to meet the rapid development of integrated circuit technology need